Granted Patent
Utility
US 5,145,512 · App. 07/293,031
Tungsten nickel iron alloys
Inventors:
James R. Spencer, James A. Mullendore
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Jan 3, 1989
Inventors
James R. Spencer
James A. Mullendore
Assignee (at issue)
GTE Products Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.